A more thorough explanation:

Impruiare (im-proo-ee-air-ee), verb. [Law Latin] Historical term used to describe the act of improving land.

• John decided to impruiare his farmland by adding irrigation systems and planting new crops.
• The landlord required the tenant to impruiare the property by repairing the fence and planting a garden.

These examples illustrate how the term impruiare was used in the past to describe the act of improving land. It was often used in legal documents to specify the responsibilities of landowners or tenants to make changes that would enhance the value or productivity of the land.